Woven fabric.



, No. 686,230. Patented Nov. 5,1901.

C. H. LANDENBERGER.

WUVEN FABRIC.

, (Application filed July 29, 1901.)

(No Model.)

CHARLES H. LANDFNBERGE-R, OF

FFICE@ arnNr PHILADELPHIA, PENNSYLVANIA,

ASSIGNOR TO THE FIRM OF F. A. BOCIIMANN rb COMPANY, OF PHILADELPHIA,.PENNSYLVANIA.

WOVEN FABRIC.

SPECIFICATION forming part of Letters Patent No. 686,2 30, dated November 5, 1901.

Application filed .Tuly 29, 1901.

To cil/ZZ whom, it may concern/.j

Be it known that I, CHARLES. H. LANDEN- BERGER, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented cert-ain Improvements in Woven Fabrics, of which the following is a specification.

The object of my invention is to produce hollow ribs or tucks in a piece of woven fabric during the operation of weaving the same, an object which I attain by the use of warpthreads, each engaging with the weft-threads first on one side and then on the other side of a group of ordinary warp-threads and under such tension as to draw together or bunch the intervening web, so as to cause the saine to rise and form the desired hollow rib on the face of the fabric.

i In the accompanying drawings, Figure l is a View of a piece of woven fabric having hollow ribs or tucks formed thereon in accordance with my invention. Fig. 2is an exaggerated section of part of the fabric, taken on the line a a or in the direction ofthe weftthreads; and Fig. 3 is an exaggerated View of a number of the warp and weft threads, showing the method of interweaving the same in carrying out inyinvention, `the threads being separated from eachother, so that the course of each thread can be more clearly seen.

Heretofore in producing a ribbed edect upon a woven fabric it has been usual to einploya cord of any desired thickness running either in the direction of the warp or the weft and overlaid and tied down by the weft-threads or warp-threads of the fabric. In carrying out my invention I dispense with the necessity of using such a filling-cord and form a hollow rib or tuck in the fabric in the following manner:

In Fig. 3 of the drawings, l represents the ordinary warp-threads of the fabric, and 2 the weft-threads, these two sets of threads being interwoven to produce a woven fabric of any desired character, so far as the general weave is concerned. At intervals throughout the fabric,however,I employ warpthreads 3, each of which after engaging with one or more of the weft-threads is carried laterally under any desired number of regular warp-threads l before engaging with a sub- Serial No. 70,087. (No model.)

sequently-inserted weft thread or threads. Thus, as shown in Fig. 3, the warp-thread 3 passes under four of the regular warp-threads 1 `between its successive interweavings with the weftthreads 2. If, therefore, this warpthread 3 is under considerable tension, it will have 'a tendency to straighten out when the opportunity faffords, and consequently the bights of the waved thread will approach each other with the effect of biinching-and raising up the web of fabric formed by the interwoven warp and weft threads l and 2 lying between the points of engagement of the warpthread 3 with said weft-threads 2, the effect being the production of a hollow rib or tuck upon the face of the fabric, as shown in Fig. 2. In order to increase the effect of this rib or tuck, it is preferable to dilferentiate the weave of the strip of fabric composing the same from that of the fabric flanking the same. For instance, the flanking fabric may be woven plain and the strip of fabrieforming the rib or tuck may be woven with some form of twill, as shown, for instance, in Fig. l. By this means tucks similar' to those produced in woven fabric by a special and subsequent tucking operation can be formed during the weaving of the fabric, and the necessity of resorting to cords for the purpose of forming raised ribs on the fabric is wholly obviated, in either case materially reducing the expense of the fabric and, as compared with the corded fabric, reducing the weight of the same, and

therefore rendering it more acceptable forl many uses.

The threads 3 may be warp-threads controlled by doupheddles or they may be threads introduced by the operation known as lappet-weaving.

Having thus described my invention, I claim and desire to secure by Letters Patentl. A Woven fabric having a hollow rib or tuck produced by a zigzag thread including in its lateral spread a group or series of warpthreads, and under such tension as to cause the fabrichaving said warp-threads to bunch or buckle, substantially as specified.

2. A woven fabric having a hollow rib or tuck produced by a warp-thread engaging IOO with the weft-threads first on one side and or buckle, the character of Weave in the rib then on the other side of a group of regular or tuck being differentiated from that in the Warp-threads, and under such tension as to body of the fabric, substantially as specified.

cause the intervening fabric to bunch or In testimony whereof I have signed my 5 buckle, substantially as specified. name to this specication in the presence of 15 3. A Woven fabric having a hollow rib or two subscribing Witnesses. tuck formed thereon by a zigzag; thread, in- CHARLES H. LANDENBERGER. ciuding in itslateral spread a group 0E Warp- 4itnessesz threads, and under such tension as to cause F. E. BECHTOLD,

1o the fabric having such Warp-threads to bunch JOS. E. KLEIN. 

